Books like Priestess of Avalon
Marion Zimmer Bradley, Diana L. Paxson
Priestess of Avalon is 404 pages, about 7 hours 24 minutes at 250 words a minute.
12 books to read next
How long each takes
A Connecticut Yankee in King Arthur's Court 7.3 h 
The Road to Avalon 7.3 h 
Arthur 9.4 h 
The Hollow Hills 8.7 h 
The Last Enchantment 9.4 h 
The Book of Merlyn 3.5 h 
Island of Ghosts 5.9 h 
The Fort at River's Bend 8.8 h 
The Crystal Cave 8.8 h 
Merlín 8.8 h 
Avalon 8.2 h 
The Skystone 11.6 h Bar height shows length. Estimated at 250 words a minute.